Footwear upper



FIG. 1 is a right side view of a footwear upper, showing our new design;

FIG. 2 is a left perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a left side view thereof.

The broken line showing of a shoe sole in FIGS. 1-6 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a footwear upper, as shown and described. 